82 (number)

82 (eighty-two) is the natural number following 81 and preceding 83.

In mathematics
82 is:
 * the twenty-seventh semiprime and the thirteenth of the form (2.q).
 * with an aliquot sum of 44, within an aliquot sequence of four composite numbers (82,44,40,50,43,1,0) to the Prime in the 43-aliquot tree.
 * a companion Pell number.
 * a happy number.
 * palindromic in bases 3 (100013), 9 (1019) and 40 (2240).

In science

 * The atomic number of lead.
 * The sixth magic number.
 * Messier 82, a starburst galaxy in the constellation Ursa Major.
 * The New General Catalogue object NGC 82, a single star in the constellation Andromeda.

In other fields
Eighty-two is also:


 * The model number of: Mark 82 bomb, a nonguided general-purpose bomb.
 * The number of the French department Tarn-et-Garonne.
 * The code for international direct dial phone calls to South Korea.
 * The ISBN Group Identifier for books published in Norway.
 * Title of Dennis Smith's book about firefighters, Report from Engine Co. 82.
 * The year AD 82, 82 BC, or 1982, stylized as '82.
 * The number of Trip Murphy's (Matt Dillon) car in Herbie: Fully Loaded (2005).
 * The second studio album by African electropop outfit Just a Band (2009).
 * The number (*82) to unblock your caller ID for phones that block anonymous incoming calls.
 * The very significant number that appears at the end of Kurt Vonnegut's book Hocus Pocus.

In sports

 * Both the NBA and NHL operate 82-game regular seasons.
 * In Major League Baseball, the number of games a team must win to secure a winning season.